上课不要迟到。你必须准时上课。
准时上课是最基本的，谁也不允许迟到。
Being punctual for classes was essential, no one was allowed to be late.
无论是骑自行车还是乘公共汽车，他总是准时上课。
Whether he rides a bike or takes a bus, he always attends class on time.
如果你们都能准时上课，那就大大地帮了我的忙了。
It would help me a great deal if you could all be punctual to class.
我现在不得不走了，因为我得准时去上课。
那么，非常欢迎你加入我的课程，我希望你会过得很愉快。但是一定要确定你能准时来上课。
Then welcome to join the class and i hope you will enjoy it. but make sure you come to my class on time.
我得准时去上课。
额，我要求我们上课要准时。
她来上课总是准时。
请按课表时间准时参加课程，上课时请认真听讲。
Please be on time for classes and listen carefully during class times.
请准时到教室上课。
班上有些同学上课老是迟到，可上陈老师的课都很准时！
Some students are always late for class, but they are very punctual for her class.
班上有些同学上课老是迟到，可上陈老师的课都很准时！
Some students are always late for class, but they are very punctual for her class.
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